Brush-holder for electric machines.



No. 670,!l9. Patented Mar. 19, 1901.

' J. men.

BRUSH HOLDER FOB ELECTRIC MACHINES.

(Application filed Apr. 26, 1900.)

(No man.)

m: NURRIS PETERS co. rnoraurnm 'waswum'omp. c.

UNITED STATES PATENT OFFICE.

JOHN TRIER, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TODONALD GRANT, OF FARIBAULT, MINNESOTA.

BRUSH-HOLDER FOR ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 670,119, dated March19, 1901.

Application filed April 26, 1900. Serial No. 14,394. (No model.)

T a w m i may COW/067%: ment of said lever in a direction away from Beit known that I, JOHN TRIER, a citizen the armature and to hold the heelor shoulof the United States, residing at Chicago, in derDin engagementwith the frame,as clearly the county of Cook and State of Illinois, haveshown in Fig. 1. At the outer or free end of 5 invented a new and usefulBrush-I-Iolderfor' the lever B, but insulated therefrom, is a ElectricMachines, of which the following is chamber G, in which is received oneor more a specification. brushes II. The chamber G comprises a cast-Th1s invention relates to brush-holders for ing having longitudinalslots J in the ends electric machines. thereof, in which slots arereceived the ends IO One object of the invention is to simplify of astrip or bar K. Springs L are attached and improve the construction ofbrush-holdto each end of bar or strip K, the other ers and to render thesame efficient in Opera ends of said springs being attached to suittion.able lugs M, cast or otherwise joined on or A further object is toprovide a construcsecured to the chamber-casting G. The bar I 5 tionwherein inspection of the brushes is renor strip K is designed to restupon or engage dered easy and the brushes may be readily the outer endsof the carbons or other forms and easily inserted or replaced in theholder. of brushes H, and by the construction above The inventionconsists substantially in the set forth the springs L serve toconstantly construction,combination, location, and relapress or feed thebrushes longitudinally toac tive arrangement, all as will be more fullyward the surface of the commutator, thereby hereinafter set forth, asshown in the acmaintaining efficient contact of the brushes companyingdrawings, and finally pointed with the commutator-surface as the brushesout in the appended claims. wear away, while at the same time the cham-Referring to the accompanying drawings her-casting G or the end of thelever B is pre- 25 and to the various views and references apvented fromapproaching too close to the compearing thereon, Figure l is a view inend mutator-surface by the engagement of the elevation, partly intransverse section, of a heel or shoulder D with a fixed part of themotor, showing the inclosing casing therefor framework. and theconstruction and arrangement of By hinging or pivoting the lever B, asat 3o brush-holderembodying the principles of my C, as above described,the lever B may be invention. Fig. 2 is a detached detail secreadilyrocked in a direction to carry the tional view showing the manner ofmounting brush-holding chamber G away from the comthe brush in theholder. mutator-surface, thereby enabling the car- The same part isdesignated by the same bons to be readily and easily inserted in or 35reference-sign. removed from the chamber G, the spring F In the drawingsreference-sign Adesignates serving to hold the lever B in elevatedposithe motor, which may be of any well-known tion when rocked about itspivots to raise the type or construction. brushes. A convenientarrangement is shown B is a casting, which I will herein desigforsupporting two brush holding levers,

4o nate as the brush-holderlever. This lever wherein a casting or plateN is bolted or othis pivotally mounted, as at O, to a convenerwisesecured to the frame and one end of ient part of the stationary frameand is proeach of two levers B is hinged or pivoted to vided with ashoulder or heel piece (shown at the respective ends of plate or castingN, as D) arranged to project beyond the point of clearly shown in thedrawings. The cham- 5 45 pivotal support of said lever B and toenber-casting G is provided with a lug or progage a fixed part of theadjacent frame, therejection (indicated at O) to form a bindingbylimiting the rocking movement of the lever post or other means ofattachment of the con- B toward the commutator E of the motor. duetor.

Suitably secured to the frame is a spring F, While a brush-holderembodying the prin- I00 50 arranged to engage underneath the lever Bciples of construction above outlined is adaptand to yieldingly resistthe rocking moveed for use generally in connection with electricmachines, it is particularly well adapted and designed for use inconnection with motors employed in automobiles or autotrucks, Vehicles,or carriages, wherein the vibrations due to the jolts of the vehicle orcarriage Wheels rolling over rough places, car-tracks, stones, or thelike are likely to be transmitted to the brush-holders, and therebycause a toorapid wear of the carbon or other brushes or causing thebrush-holder to be brought into contact with the commutator-surface. Inthe construction above described this is impossible, as the lever B isprevented from unduly approaching the commutator-surface by theengagement of the heel or shoulder D with the framework, while thesprings L operate to maintain the brushes in constant contact with thecommutator-surface.

In the use of motors for automobiles or autotrucks, carriages, vehicles,or thelike it is exceedingly desirable to protect the motor from dust,dirt, or the like. To this end it is the custom to inclose the entiremotor within a protecting-casing. This protecting-casing is indicated atP. However, it is desirable to provide means whereby access may be hadto the brush-holders for the purpose of inspection, repairs, orrenewals. I therefore form openings in the motor-casing at the pointswhere the brush-holders are located,and I pro vide a hinged section orcover (indicated at Q) for closing said openings. This section or coveris hinged along one end or edge at S, and a suitable clamp or otherconvenient form of lock R is provided for securing the opposite end oredge. In this manner the entire motor, including the brush-holders, isinclosed, while at any time the brush-holders may be inspected or thebrushes renewed or removed by swinging back the hinged cover or sectionQ and then rocking or swinging the levers B outwardly, as will bereadily understood. As shown, the plate or casting N is bolted orotherwise secured to the motor-casing at a point between the openingsprovided for adjacent brushes, so as to permit the ends thereof toproject over said openings, as clearly shown.

It is obvious that as many brush-holders as desired may be employed inconnection with the motor.

It is to be understood that many changes and Variations in the detailsof construction and arrangement would readily occur to persons skilledin the art and still fall Within the spirit and scope of my invention. Ido not desire,

therefore, to be limited or restricted to the exact details ofconstruction shown; but,

Having now set forth the object and nature of my invention and aconstruction embodying the principles thereof, what I claim as new anduseful and of my own invention, and desire to secure by Letters Patent,is

1. In a brush holder, a lever pivotally mounted, a stop for limiting themovement of said lever toward the commutator, means for yieldinglyresisting the movement of lhe lever in the other direction, a brushmounted in the free end of said lever and means for imposing a feedingpressure on said brush, as and for the purpose set forth.

2. *In a brush-holder, a pivotally-mounted lover, a chamber carried inthe free end of said lever, and adapted to receive the brush, saidchamber having slots in the ends thereof, a strip or bar arranged toengage the end of the brush and having its ends arranged to be receivedin said slots, springs operating on said strip or bar to press the brushto its work and a stop for said lever, as and for the purpose set forth.

3. In a brush-holder, a pivotally-mounted lever, a chamber carried inthe free end of said lever, and adapted to receive the brush, saidchamber havin slots in the ends thereof, a strip or bar arranged toengage the end of the brush and having its ends arranged to opcrate insaid slots, lugs formed on the ends of said chamber, springs connectedat one end to said lugs and at the other to said strip or bar and a stopfor said lever, as and for the purpose set forth.

4. In a brush holder, a pivotally-mounted lever, a chamber supported inthe free end of said lever but insulated therefrom, and adapted toreceive the brush, a stop for limiting the movement of said lever andmeans engaging said brush for constantly pressing the brush to its work,as and for the purpose set forth.

5. The combination with a motor of an in closing casing therefor, abrush-holder pivotally mounted on said casing, said casing having anopening adjacent to which said brushholder is pivoted, and a hingedcover for said opening, as and for the purpose set forth.

6. The combination with a motor of an inclosing casing therefor, saidcasing provided with openings therein, a plate secured to said casingand having its ends projecting over said openings, brush-holding leversarranged in said openings and pivotally connected to the ends of saidplates and a hinged cover for said openings, as and for the purpose setforth.

In witness whereof I have hereunto set my hand, this 10th day of March,1900, in the presence of the subscribing Witnesses.

JOHN TRIER.

Witnesses:

E. O. SEMPLE, S. E. DARBY.

IIO

